tree beb9aa23865aa046e36227e42f3bceddfb18cf8b
parent 6c914e4232cd262001645e932e9156555f1a5823
author Simon Glass <sjg@chromium.org> 1615782335 +1300
committer Simon Glass <sjg@chromium.org> 1616731389 +1300

dm: core: Add an option to support SPL in read-only memory

Some systems (e.g. x86 APL) run SPL from read-only memory. The device
instances created by dtoc are therefore not writeable. To make things work
we would need to copy the devices to read/write memory.

To avoid this, add an option to use a separate runtime struct for devices,
just as is done for drivers. This can be used to hold information that
changes at runtime, avoiding the need for a copy.

Also add a Kconfig option for read-only SPL, which selects this feature.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>